1 /* 2 ** 3 ** File: fmopl.c -- software implementation of FM sound generator 4 ** 5 ** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development 6 ** 7 ** Version 0.37a 8 ** 9 */ 10 11 /* 12 preliminary : 13 Problem : 14 note: 15 */ 16 17 /* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL. 18 * 19 * This library is free software; you can redistribute it and/or 20 * modify it under the terms of the GNU Lesser General Public 21 * License as published by the Free Software Foundation; either 22 * version 2.1 of the License, or (at your option) any later version. 23 * 24 * This library is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 27 * Lesser General Public License for more details. 28 * 29 * You should have received a copy of the GNU Lesser General Public 30 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 31 */ 32 33 #include "qemu/osdep.h" 34 #include <math.h> 35 //#include "driver.h" /* use M.A.M.E. */ 36 #include "fmopl.h" 37 38 #ifndef PI 39 #define PI 3.14159265358979323846 40 #endif 41 42 #ifndef ARRAY_SIZE 43 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 44 #endif 45 46 /* -------------------- for debug --------------------- */ 47 /* #define OPL_OUTPUT_LOG */ 48 #ifdef OPL_OUTPUT_LOG 49 static FILE *opl_dbg_fp = NULL; 50 static FM_OPL *opl_dbg_opl[16]; 51 static int opl_dbg_maxchip,opl_dbg_chip; 52 #endif 53 54 /* -------------------- preliminary define section --------------------- */ 55 /* attack/decay rate time rate */ 56 #define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ 57 #define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ 58 59 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */ 60 61 #define FREQ_BITS 24 /* frequency turn */ 62 63 /* counter bits = 20 , octerve 7 */ 64 #define FREQ_RATE (1<<(FREQ_BITS-20)) 65 #define TL_BITS (FREQ_BITS+2) 66 67 /* final output shift , limit minimum and maximum */ 68 #define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ 69 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB) 70 #define OPL_MINOUT (-0x8000<<OPL_OUTSB) 71 72 /* -------------------- quality selection --------------------- */ 73 74 /* sinwave entries */ 75 /* used static memory = SIN_ENT * 4 (byte) */ 76 #define SIN_ENT 2048 77 78 /* output level entries (envelope,sinwave) */ 79 /* envelope counter lower bits */ 80 #define ENV_BITS 16 81 /* envelope output entries */ 82 #define EG_ENT 4096 83 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */ 84 /* used static memory = EG_ENT*4 (byte) */ 85 86 #define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */ 87 #define EG_DED EG_OFF 88 #define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */ 89 #define EG_AED EG_DST 90 #define EG_AST 0 /* ATTACK START */ 91 92 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ 93 94 /* LFO table entries */ 95 #define VIB_ENT 512 96 #define VIB_SHIFT (32-9) 97 #define AMS_ENT 512 98 #define AMS_SHIFT (32-9) 99 100 #define VIB_RATE 256 101 102 /* -------------------- local defines , macros --------------------- */ 103 104 /* register number to channel number , slot offset */ 105 #define SLOT1 0 106 #define SLOT2 1 107 108 /* envelope phase */ 109 #define ENV_MOD_RR 0x00 110 #define ENV_MOD_DR 0x01 111 #define ENV_MOD_AR 0x02 112 113 /* -------------------- tables --------------------- */ 114 static const int slot_array[32]= 115 { 116 0, 2, 4, 1, 3, 5,-1,-1, 117 6, 8,10, 7, 9,11,-1,-1, 118 12,14,16,13,15,17,-1,-1, 119 -1,-1,-1,-1,-1,-1,-1,-1 120 }; 121 122 /* key scale level */ 123 /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */ 124 #define DV (EG_STEP/2) 125 static const UINT32 KSL_TABLE[8*16]= 126 { 127 /* OCT 0 */ 128 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 129 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 130 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 131 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 132 /* OCT 1 */ 133 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 134 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 135 0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV, 136 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV, 137 /* OCT 2 */ 138 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 139 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV, 140 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV, 141 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV, 142 /* OCT 3 */ 143 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV, 144 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV, 145 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV, 146 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV, 147 /* OCT 4 */ 148 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV, 149 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV, 150 9.000/DV, 9.750/DV,10.125/DV,10.500/DV, 151 10.875/DV,11.250/DV,11.625/DV,12.000/DV, 152 /* OCT 5 */ 153 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV, 154 9.000/DV,10.125/DV,10.875/DV,11.625/DV, 155 12.000/DV,12.750/DV,13.125/DV,13.500/DV, 156 13.875/DV,14.250/DV,14.625/DV,15.000/DV, 157 /* OCT 6 */ 158 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV, 159 12.000/DV,13.125/DV,13.875/DV,14.625/DV, 160 15.000/DV,15.750/DV,16.125/DV,16.500/DV, 161 16.875/DV,17.250/DV,17.625/DV,18.000/DV, 162 /* OCT 7 */ 163 0.000/DV, 9.000/DV,12.000/DV,13.875/DV, 164 15.000/DV,16.125/DV,16.875/DV,17.625/DV, 165 18.000/DV,18.750/DV,19.125/DV,19.500/DV, 166 19.875/DV,20.250/DV,20.625/DV,21.000/DV 167 }; 168 #undef DV 169 170 /* sustain lebel table (3db per step) */ 171 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ 172 #define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST 173 static const INT32 SL_TABLE[16]={ 174 SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), 175 SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) 176 }; 177 #undef SC 178 179 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */ 180 /* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */ 181 /* TL_TABLE[ 0 to TL_MAX ] : plus section */ 182 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */ 183 static INT32 *TL_TABLE; 184 185 /* pointers to TL_TABLE with sinwave output offset */ 186 static INT32 **SIN_TABLE; 187 188 /* LFO table */ 189 static INT32 *AMS_TABLE; 190 static INT32 *VIB_TABLE; 191 192 /* envelope output curve table */ 193 /* attack + decay + OFF */ 194 static INT32 ENV_CURVE[2*EG_ENT+1]; 195 196 /* multiple table */ 197 #define ML 2 198 static const UINT32 MUL_TABLE[16]= { 199 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */ 200 0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML, 201 8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML 202 }; 203 #undef ML 204 205 /* dummy attack / decay rate ( when rate == 0 ) */ 206 static INT32 RATE_0[16]= 207 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 208 209 /* -------------------- static state --------------------- */ 210 211 /* lock level of common table */ 212 static int num_lock = 0; 213 214 /* work table */ 215 static void *cur_chip = NULL; /* current chip point */ 216 /* currenct chip state */ 217 /* static OPLSAMPLE *bufL,*bufR; */ 218 static OPL_CH *S_CH; 219 static OPL_CH *E_CH; 220 static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2; 221 222 static INT32 outd[1]; 223 static INT32 ams; 224 static INT32 vib; 225 static INT32 *ams_table; 226 static INT32 *vib_table; 227 static INT32 amsIncr; 228 static INT32 vibIncr; 229 static INT32 feedback2; /* connect for SLOT 2 */ 230 231 /* log output level */ 232 #define LOG_ERR 3 /* ERROR */ 233 #define LOG_WAR 2 /* WARNING */ 234 #define LOG_INF 1 /* INFORMATION */ 235 236 //#define LOG_LEVEL LOG_INF 237 #define LOG_LEVEL LOG_ERR 238 239 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x 240 #define LOG(n,x) 241 242 /* --------------------- subroutines --------------------- */ 243 244 static inline int Limit( int val, int max, int min ) { 245 if ( val > max ) 246 val = max; 247 else if ( val < min ) 248 val = min; 249 250 return val; 251 } 252 253 /* status set and IRQ handling */ 254 static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag) 255 { 256 /* set status flag */ 257 OPL->status |= flag; 258 if(!(OPL->status & 0x80)) 259 { 260 if(OPL->status & OPL->statusmask) 261 { /* IRQ on */ 262 OPL->status |= 0x80; 263 /* callback user interrupt handler (IRQ is OFF to ON) */ 264 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1); 265 } 266 } 267 } 268 269 /* status reset and IRQ handling */ 270 static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag) 271 { 272 /* reset status flag */ 273 OPL->status &=~flag; 274 if((OPL->status & 0x80)) 275 { 276 if (!(OPL->status & OPL->statusmask) ) 277 { 278 OPL->status &= 0x7f; 279 /* callback user interrupt handler (IRQ is ON to OFF) */ 280 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0); 281 } 282 } 283 } 284 285 /* IRQ mask set */ 286 static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) 287 { 288 OPL->statusmask = flag; 289 /* IRQ handling check */ 290 OPL_STATUS_SET(OPL,0); 291 OPL_STATUS_RESET(OPL,0); 292 } 293 294 /* ----- key on ----- */ 295 static inline void OPL_KEYON(OPL_SLOT *SLOT) 296 { 297 /* sin wave restart */ 298 SLOT->Cnt = 0; 299 /* set attack */ 300 SLOT->evm = ENV_MOD_AR; 301 SLOT->evs = SLOT->evsa; 302 SLOT->evc = EG_AST; 303 SLOT->eve = EG_AED; 304 } 305 /* ----- key off ----- */ 306 static inline void OPL_KEYOFF(OPL_SLOT *SLOT) 307 { 308 if( SLOT->evm > ENV_MOD_RR) 309 { 310 /* set envelope counter from envleope output */ 311 SLOT->evm = ENV_MOD_RR; 312 if( !(SLOT->evc&EG_DST) ) 313 //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; 314 SLOT->evc = EG_DST; 315 SLOT->eve = EG_DED; 316 SLOT->evs = SLOT->evsr; 317 } 318 } 319 320 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */ 321 /* return : envelope output */ 322 static inline UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT ) 323 { 324 /* calcrate envelope generator */ 325 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve ) 326 { 327 switch( SLOT->evm ){ 328 case ENV_MOD_AR: /* ATTACK -> DECAY1 */ 329 /* next DR */ 330 SLOT->evm = ENV_MOD_DR; 331 SLOT->evc = EG_DST; 332 SLOT->eve = SLOT->SL; 333 SLOT->evs = SLOT->evsd; 334 break; 335 case ENV_MOD_DR: /* DECAY -> SL or RR */ 336 SLOT->evc = SLOT->SL; 337 SLOT->eve = EG_DED; 338 if(SLOT->eg_typ) 339 { 340 SLOT->evs = 0; 341 } 342 else 343 { 344 SLOT->evm = ENV_MOD_RR; 345 SLOT->evs = SLOT->evsr; 346 } 347 break; 348 case ENV_MOD_RR: /* RR -> OFF */ 349 SLOT->evc = EG_OFF; 350 SLOT->eve = EG_OFF+1; 351 SLOT->evs = 0; 352 break; 353 } 354 } 355 /* calcrate envelope */ 356 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); 357 } 358 359 /* set algorithm connection */ 360 static void set_algorithm( OPL_CH *CH) 361 { 362 INT32 *carrier = &outd[0]; 363 CH->connect1 = CH->CON ? carrier : &feedback2; 364 CH->connect2 = carrier; 365 } 366 367 /* ---------- frequency counter for operater update ---------- */ 368 static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) 369 { 370 int ksr; 371 372 /* frequency step counter */ 373 SLOT->Incr = CH->fc * SLOT->mul; 374 ksr = CH->kcode >> SLOT->KSR; 375 376 if( SLOT->ksr != ksr ) 377 { 378 SLOT->ksr = ksr; 379 /* attack , decay rate recalcration */ 380 SLOT->evsa = SLOT->AR[ksr]; 381 SLOT->evsd = SLOT->DR[ksr]; 382 SLOT->evsr = SLOT->RR[ksr]; 383 } 384 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 385 } 386 387 /* set multi,am,vib,EG-TYP,KSR,mul */ 388 static inline void set_mul(FM_OPL *OPL,int slot,int v) 389 { 390 OPL_CH *CH = &OPL->P_CH[slot/2]; 391 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 392 393 SLOT->mul = MUL_TABLE[v&0x0f]; 394 SLOT->KSR = (v&0x10) ? 0 : 2; 395 SLOT->eg_typ = (v&0x20)>>5; 396 SLOT->vib = (v&0x40); 397 SLOT->ams = (v&0x80); 398 CALC_FCSLOT(CH,SLOT); 399 } 400 401 /* set ksl & tl */ 402 static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v) 403 { 404 OPL_CH *CH = &OPL->P_CH[slot/2]; 405 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 406 int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ 407 408 SLOT->ksl = ksl ? 3-ksl : 31; 409 SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */ 410 411 if( !(OPL->mode&0x80) ) 412 { /* not CSM latch total level */ 413 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 414 } 415 } 416 417 /* set attack rate & decay rate */ 418 static inline void set_ar_dr(FM_OPL *OPL,int slot,int v) 419 { 420 OPL_CH *CH = &OPL->P_CH[slot/2]; 421 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 422 int ar = v>>4; 423 int dr = v&0x0f; 424 425 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0; 426 SLOT->evsa = SLOT->AR[SLOT->ksr]; 427 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa; 428 429 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; 430 SLOT->evsd = SLOT->DR[SLOT->ksr]; 431 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd; 432 } 433 434 /* set sustain level & release rate */ 435 static inline void set_sl_rr(FM_OPL *OPL,int slot,int v) 436 { 437 OPL_CH *CH = &OPL->P_CH[slot/2]; 438 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 439 int sl = v>>4; 440 int rr = v & 0x0f; 441 442 SLOT->SL = SL_TABLE[sl]; 443 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL; 444 SLOT->RR = &OPL->DR_TABLE[rr<<2]; 445 SLOT->evsr = SLOT->RR[SLOT->ksr]; 446 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr; 447 } 448 449 /* operator output calcrator */ 450 #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] 451 /* ---------- calcrate one of channel ---------- */ 452 static inline void OPL_CALC_CH( OPL_CH *CH ) 453 { 454 UINT32 env_out; 455 OPL_SLOT *SLOT; 456 457 feedback2 = 0; 458 /* SLOT 1 */ 459 SLOT = &CH->SLOT[SLOT1]; 460 env_out=OPL_CALC_SLOT(SLOT); 461 if( env_out < EG_ENT-1 ) 462 { 463 /* PG */ 464 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 465 else SLOT->Cnt += SLOT->Incr; 466 /* connectoion */ 467 if(CH->FB) 468 { 469 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; 470 CH->op1_out[1] = CH->op1_out[0]; 471 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 472 } 473 else 474 { 475 *CH->connect1 += OP_OUT(SLOT,env_out,0); 476 } 477 }else 478 { 479 CH->op1_out[1] = CH->op1_out[0]; 480 CH->op1_out[0] = 0; 481 } 482 /* SLOT 2 */ 483 SLOT = &CH->SLOT[SLOT2]; 484 env_out=OPL_CALC_SLOT(SLOT); 485 if( env_out < EG_ENT-1 ) 486 { 487 /* PG */ 488 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 489 else SLOT->Cnt += SLOT->Incr; 490 /* connectoion */ 491 outd[0] += OP_OUT(SLOT,env_out, feedback2); 492 } 493 } 494 495 /* ---------- calcrate rhythm block ---------- */ 496 #define WHITE_NOISE_db 6.0 497 static inline void OPL_CALC_RH( OPL_CH *CH ) 498 { 499 UINT32 env_tam,env_sd,env_top,env_hh; 500 int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP); 501 INT32 tone8; 502 503 OPL_SLOT *SLOT; 504 int env_out; 505 506 /* BD : same as FM serial mode and output level is large */ 507 feedback2 = 0; 508 /* SLOT 1 */ 509 SLOT = &CH[6].SLOT[SLOT1]; 510 env_out=OPL_CALC_SLOT(SLOT); 511 if( env_out < EG_ENT-1 ) 512 { 513 /* PG */ 514 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 515 else SLOT->Cnt += SLOT->Incr; 516 /* connectoion */ 517 if(CH[6].FB) 518 { 519 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; 520 CH[6].op1_out[1] = CH[6].op1_out[0]; 521 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 522 } 523 else 524 { 525 feedback2 = OP_OUT(SLOT,env_out,0); 526 } 527 }else 528 { 529 feedback2 = 0; 530 CH[6].op1_out[1] = CH[6].op1_out[0]; 531 CH[6].op1_out[0] = 0; 532 } 533 /* SLOT 2 */ 534 SLOT = &CH[6].SLOT[SLOT2]; 535 env_out=OPL_CALC_SLOT(SLOT); 536 if( env_out < EG_ENT-1 ) 537 { 538 /* PG */ 539 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 540 else SLOT->Cnt += SLOT->Incr; 541 /* connectoion */ 542 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; 543 } 544 545 // SD (17) = mul14[fnum7] + white noise 546 // TAM (15) = mul15[fnum8] 547 // TOP (18) = fnum6(mul18[fnum8]+whitenoise) 548 // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise 549 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; 550 env_tam=OPL_CALC_SLOT(SLOT8_1); 551 env_top=OPL_CALC_SLOT(SLOT8_2); 552 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; 553 554 /* PG */ 555 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); 556 else SLOT7_1->Cnt += 2*SLOT7_1->Incr; 557 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); 558 else SLOT7_2->Cnt += (CH[7].fc*8); 559 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE); 560 else SLOT8_1->Cnt += SLOT8_1->Incr; 561 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); 562 else SLOT8_2->Cnt += (CH[8].fc*48); 563 564 tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); 565 566 /* SD */ 567 if( env_sd < EG_ENT-1 ) 568 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; 569 /* TAM */ 570 if( env_tam < EG_ENT-1 ) 571 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; 572 /* TOP-CY */ 573 if( env_top < EG_ENT-1 ) 574 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; 575 /* HH */ 576 if( env_hh < EG_ENT-1 ) 577 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; 578 } 579 580 /* ----------- initialize time tabls ----------- */ 581 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) 582 { 583 int i; 584 double rate; 585 586 /* make attack rate & decay rate tables */ 587 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; 588 for (i = 4;i <= 60;i++){ 589 rate = OPL->freqbase; /* frequency rate */ 590 if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ 591 rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ 592 rate *= (double)(EG_ENT<<ENV_BITS); 593 OPL->AR_TABLE[i] = rate / ARRATE; 594 OPL->DR_TABLE[i] = rate / DRRATE; 595 } 596 for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++) 597 { 598 OPL->AR_TABLE[i] = EG_AED-1; 599 OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; 600 } 601 #if 0 602 for (i = 0;i < 64 ;i++){ /* make for overflow area */ 603 LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i, 604 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate), 605 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) )); 606 } 607 #endif 608 } 609 610 /* ---------- generic table initialize ---------- */ 611 static int OPLOpenTable( void ) 612 { 613 int s,t; 614 double rate; 615 int i,j; 616 double pom; 617 618 /* allocate dynamic tables */ 619 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(INT32))) == NULL) 620 return 0; 621 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(INT32 *))) == NULL) 622 { 623 free(TL_TABLE); 624 return 0; 625 } 626 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(INT32))) == NULL) 627 { 628 free(TL_TABLE); 629 free(SIN_TABLE); 630 return 0; 631 } 632 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(INT32))) == NULL) 633 { 634 free(TL_TABLE); 635 free(SIN_TABLE); 636 free(AMS_TABLE); 637 return 0; 638 } 639 /* make total level table */ 640 for (t = 0;t < EG_ENT-1 ;t++){ 641 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */ 642 TL_TABLE[ t] = (int)rate; 643 TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; 644 /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/ 645 } 646 /* fill volume off area */ 647 for ( t = EG_ENT-1; t < TL_MAX ;t++){ 648 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0; 649 } 650 651 /* make sinwave table (total level offet) */ 652 /* degree 0 = degree 180 = off */ 653 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; 654 for (s = 1;s <= SIN_ENT/4;s++){ 655 pom = sin(2*PI*s/SIN_ENT); /* sin */ 656 pom = 20*log10(1/pom); /* decibel */ 657 j = pom / EG_STEP; /* TL_TABLE steps */ 658 659 /* degree 0 - 90 , degree 180 - 90 : plus section */ 660 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j]; 661 /* degree 180 - 270 , degree 360 - 270 : minus section */ 662 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j]; 663 /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/ 664 } 665 for (s = 0;s < SIN_ENT;s++) 666 { 667 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; 668 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; 669 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; 670 } 671 672 /* envelope counter -> envelope output table */ 673 for (i=0; i<EG_ENT; i++) 674 { 675 /* ATTACK curve */ 676 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; 677 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ 678 ENV_CURVE[i] = (int)pom; 679 /* DECAY ,RELEASE curve */ 680 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; 681 } 682 /* off */ 683 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1; 684 /* make LFO ams table */ 685 for (i=0; i<AMS_ENT; i++) 686 { 687 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ 688 AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */ 689 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */ 690 } 691 /* make LFO vibrate table */ 692 for (i=0; i<VIB_ENT; i++) 693 { 694 /* 100cent = 1seminote = 6% ?? */ 695 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ 696 VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */ 697 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */ 698 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */ 699 } 700 return 1; 701 } 702 703 704 static void OPLCloseTable( void ) 705 { 706 free(TL_TABLE); 707 free(SIN_TABLE); 708 free(AMS_TABLE); 709 free(VIB_TABLE); 710 } 711 712 /* CSM Key Control */ 713 static inline void CSMKeyControll(OPL_CH *CH) 714 { 715 OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; 716 OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; 717 /* all key off */ 718 OPL_KEYOFF(slot1); 719 OPL_KEYOFF(slot2); 720 /* total level latch */ 721 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 722 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 723 /* key on */ 724 CH->op1_out[0] = CH->op1_out[1] = 0; 725 OPL_KEYON(slot1); 726 OPL_KEYON(slot2); 727 } 728 729 /* ---------- opl initialize ---------- */ 730 static void OPL_initialize(FM_OPL *OPL) 731 { 732 int fn; 733 734 /* frequency base */ 735 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; 736 /* Timer base time */ 737 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); 738 /* make time tables */ 739 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); 740 /* make fnumber -> increment counter table */ 741 for( fn=0 ; fn < 1024 ; fn++ ) 742 { 743 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2; 744 } 745 /* LFO freq.table */ 746 OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0; 747 OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0; 748 } 749 750 /* ---------- write a OPL registers ---------- */ 751 static void OPLWriteReg(FM_OPL *OPL, int r, int v) 752 { 753 OPL_CH *CH; 754 int slot; 755 int block_fnum; 756 757 switch(r&0xe0) 758 { 759 case 0x00: /* 00-1f:control */ 760 switch(r&0x1f) 761 { 762 case 0x01: 763 /* wave selector enable */ 764 if(OPL->type&OPL_TYPE_WAVESEL) 765 { 766 OPL->wavesel = v&0x20; 767 if(!OPL->wavesel) 768 { 769 /* preset compatible mode */ 770 int c; 771 for(c=0;c<OPL->max_ch;c++) 772 { 773 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; 774 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; 775 } 776 } 777 } 778 return; 779 case 0x02: /* Timer 1 */ 780 OPL->T[0] = (256-v)*4; 781 break; 782 case 0x03: /* Timer 2 */ 783 OPL->T[1] = (256-v)*16; 784 return; 785 case 0x04: /* IRQ clear / mask and Timer enable */ 786 if(v&0x80) 787 { /* IRQ flag clear */ 788 OPL_STATUS_RESET(OPL,0x7f); 789 } 790 else 791 { /* set IRQ mask ,timer enable*/ 792 uint8_t st1 = v&1; 793 uint8_t st2 = (v>>1)&1; 794 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ 795 OPL_STATUS_RESET(OPL,v&0x78); 796 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); 797 /* timer 2 */ 798 if(OPL->st[1] != st2) 799 { 800 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; 801 OPL->st[1] = st2; 802 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); 803 } 804 /* timer 1 */ 805 if(OPL->st[0] != st1) 806 { 807 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; 808 OPL->st[0] = st1; 809 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); 810 } 811 } 812 return; 813 } 814 break; 815 case 0x20: /* am,vib,ksr,eg type,mul */ 816 slot = slot_array[r&0x1f]; 817 if(slot == -1) return; 818 set_mul(OPL,slot,v); 819 return; 820 case 0x40: 821 slot = slot_array[r&0x1f]; 822 if(slot == -1) return; 823 set_ksl_tl(OPL,slot,v); 824 return; 825 case 0x60: 826 slot = slot_array[r&0x1f]; 827 if(slot == -1) return; 828 set_ar_dr(OPL,slot,v); 829 return; 830 case 0x80: 831 slot = slot_array[r&0x1f]; 832 if(slot == -1) return; 833 set_sl_rr(OPL,slot,v); 834 return; 835 case 0xa0: 836 switch(r) 837 { 838 case 0xbd: 839 /* amsep,vibdep,r,bd,sd,tom,tc,hh */ 840 { 841 uint8_t rkey = OPL->rhythm^v; 842 OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; 843 OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; 844 OPL->rhythm = v&0x3f; 845 if(OPL->rhythm&0x20) 846 { 847 #if 0 848 usrintf_showmessage("OPL Rhythm mode select"); 849 #endif 850 /* BD key on/off */ 851 if(rkey&0x10) 852 { 853 if(v&0x10) 854 { 855 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; 856 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); 857 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); 858 } 859 else 860 { 861 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); 862 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); 863 } 864 } 865 /* SD key on/off */ 866 if(rkey&0x08) 867 { 868 if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); 869 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); 870 }/* TAM key on/off */ 871 if(rkey&0x04) 872 { 873 if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); 874 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); 875 } 876 /* TOP-CY key on/off */ 877 if(rkey&0x02) 878 { 879 if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); 880 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); 881 } 882 /* HH key on/off */ 883 if(rkey&0x01) 884 { 885 if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); 886 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); 887 } 888 } 889 } 890 return; 891 } 892 /* keyon,block,fnum */ 893 if( (r&0x0f) > 8) return; 894 CH = &OPL->P_CH[r&0x0f]; 895 if(!(r&0x10)) 896 { /* a0-a8 */ 897 block_fnum = (CH->block_fnum&0x1f00) | v; 898 } 899 else 900 { /* b0-b8 */ 901 int keyon = (v>>5)&1; 902 block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); 903 if(CH->keyon != keyon) 904 { 905 if( (CH->keyon=keyon) ) 906 { 907 CH->op1_out[0] = CH->op1_out[1] = 0; 908 OPL_KEYON(&CH->SLOT[SLOT1]); 909 OPL_KEYON(&CH->SLOT[SLOT2]); 910 } 911 else 912 { 913 OPL_KEYOFF(&CH->SLOT[SLOT1]); 914 OPL_KEYOFF(&CH->SLOT[SLOT2]); 915 } 916 } 917 } 918 /* update */ 919 if(CH->block_fnum != block_fnum) 920 { 921 int blockRv = 7-(block_fnum>>10); 922 int fnum = block_fnum&0x3ff; 923 CH->block_fnum = block_fnum; 924 925 CH->ksl_base = KSL_TABLE[block_fnum>>6]; 926 CH->fc = OPL->FN_TABLE[fnum]>>blockRv; 927 CH->kcode = CH->block_fnum>>9; 928 if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; 929 CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); 930 CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); 931 } 932 return; 933 case 0xc0: 934 /* FB,C */ 935 if( (r&0x0f) > 8) return; 936 CH = &OPL->P_CH[r&0x0f]; 937 { 938 int feedback = (v>>1)&7; 939 CH->FB = feedback ? (8+1) - feedback : 0; 940 CH->CON = v&1; 941 set_algorithm(CH); 942 } 943 return; 944 case 0xe0: /* wave type */ 945 slot = slot_array[r&0x1f]; 946 if(slot == -1) return; 947 CH = &OPL->P_CH[slot/2]; 948 if(OPL->wavesel) 949 { 950 /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */ 951 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; 952 } 953 return; 954 } 955 } 956 957 /* lock/unlock for common table */ 958 static int OPL_LockTable(void) 959 { 960 num_lock++; 961 if(num_lock>1) return 0; 962 /* first time */ 963 cur_chip = NULL; 964 /* allocate total level table (128kb space) */ 965 if( !OPLOpenTable() ) 966 { 967 num_lock--; 968 return -1; 969 } 970 return 0; 971 } 972 973 static void OPL_UnLockTable(void) 974 { 975 if(num_lock) num_lock--; 976 if(num_lock) return; 977 /* last time */ 978 cur_chip = NULL; 979 OPLCloseTable(); 980 } 981 982 /*******************************************************************************/ 983 /* YM3812 local section */ 984 /*******************************************************************************/ 985 986 /* ---------- update one of chip ----------- */ 987 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length) 988 { 989 int i; 990 int data; 991 OPLSAMPLE *buf = buffer; 992 UINT32 amsCnt = OPL->amsCnt; 993 UINT32 vibCnt = OPL->vibCnt; 994 uint8_t rhythm = OPL->rhythm&0x20; 995 OPL_CH *CH,*R_CH; 996 997 if( (void *)OPL != cur_chip ){ 998 cur_chip = (void *)OPL; 999 /* channel pointers */ 1000 S_CH = OPL->P_CH; 1001 E_CH = &S_CH[9]; 1002 /* rhythm slot */ 1003 SLOT7_1 = &S_CH[7].SLOT[SLOT1]; 1004 SLOT7_2 = &S_CH[7].SLOT[SLOT2]; 1005 SLOT8_1 = &S_CH[8].SLOT[SLOT1]; 1006 SLOT8_2 = &S_CH[8].SLOT[SLOT2]; 1007 /* LFO state */ 1008 amsIncr = OPL->amsIncr; 1009 vibIncr = OPL->vibIncr; 1010 ams_table = OPL->ams_table; 1011 vib_table = OPL->vib_table; 1012 } 1013 R_CH = rhythm ? &S_CH[6] : E_CH; 1014 for( i=0; i < length ; i++ ) 1015 { 1016 /* channel A channel B channel C */ 1017 /* LFO */ 1018 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; 1019 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; 1020 outd[0] = 0; 1021 /* FM part */ 1022 for(CH=S_CH ; CH < R_CH ; CH++) 1023 OPL_CALC_CH(CH); 1024 /* Rythn part */ 1025 if(rhythm) 1026 OPL_CALC_RH(S_CH); 1027 /* limit check */ 1028 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); 1029 /* store to sound buffer */ 1030 buf[i] = data >> OPL_OUTSB; 1031 } 1032 1033 OPL->amsCnt = amsCnt; 1034 OPL->vibCnt = vibCnt; 1035 #ifdef OPL_OUTPUT_LOG 1036 if(opl_dbg_fp) 1037 { 1038 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1039 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1040 fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256); 1041 } 1042 #endif 1043 } 1044 1045 /* ---------- reset one of chip ---------- */ 1046 void OPLResetChip(FM_OPL *OPL) 1047 { 1048 int c,s; 1049 int i; 1050 1051 /* reset chip */ 1052 OPL->mode = 0; /* normal mode */ 1053 OPL_STATUS_RESET(OPL,0x7f); 1054 /* reset with register write */ 1055 OPLWriteReg(OPL,0x01,0); /* wabesel disable */ 1056 OPLWriteReg(OPL,0x02,0); /* Timer1 */ 1057 OPLWriteReg(OPL,0x03,0); /* Timer2 */ 1058 OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ 1059 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); 1060 /* reset operator parameter */ 1061 for( c = 0 ; c < OPL->max_ch ; c++ ) 1062 { 1063 OPL_CH *CH = &OPL->P_CH[c]; 1064 /* OPL->P_CH[c].PAN = OPN_CENTER; */ 1065 for(s = 0 ; s < 2 ; s++ ) 1066 { 1067 /* wave table */ 1068 CH->SLOT[s].wavetable = &SIN_TABLE[0]; 1069 /* CH->SLOT[s].evm = ENV_MOD_RR; */ 1070 CH->SLOT[s].evc = EG_OFF; 1071 CH->SLOT[s].eve = EG_OFF+1; 1072 CH->SLOT[s].evs = 0; 1073 } 1074 } 1075 } 1076 1077 /* ---------- Create one of vietual YM3812 ---------- */ 1078 /* 'rate' is sampling rate and 'bufsiz' is the size of the */ 1079 FM_OPL *OPLCreate(int type, int clock, int rate) 1080 { 1081 char *ptr; 1082 FM_OPL *OPL; 1083 int state_size; 1084 int max_ch = 9; /* normaly 9 channels */ 1085 1086 if( OPL_LockTable() ==-1) return NULL; 1087 /* allocate OPL state space */ 1088 state_size = sizeof(FM_OPL); 1089 state_size += sizeof(OPL_CH)*max_ch; 1090 /* allocate memory block */ 1091 ptr = malloc(state_size); 1092 if(ptr==NULL) return NULL; 1093 /* clear */ 1094 memset(ptr,0,state_size); 1095 OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL); 1096 OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch; 1097 /* set channel state pointer */ 1098 OPL->type = type; 1099 OPL->clock = clock; 1100 OPL->rate = rate; 1101 OPL->max_ch = max_ch; 1102 /* init grobal tables */ 1103 OPL_initialize(OPL); 1104 /* reset chip */ 1105 OPLResetChip(OPL); 1106 #ifdef OPL_OUTPUT_LOG 1107 if(!opl_dbg_fp) 1108 { 1109 opl_dbg_fp = fopen("opllog.opl","wb"); 1110 opl_dbg_maxchip = 0; 1111 } 1112 if(opl_dbg_fp) 1113 { 1114 opl_dbg_opl[opl_dbg_maxchip] = OPL; 1115 fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip, 1116 type, 1117 clock&0xff, 1118 (clock/0x100)&0xff, 1119 (clock/0x10000)&0xff, 1120 (clock/0x1000000)&0xff); 1121 opl_dbg_maxchip++; 1122 } 1123 #endif 1124 return OPL; 1125 } 1126 1127 /* ---------- Destroy one of vietual YM3812 ---------- */ 1128 void OPLDestroy(FM_OPL *OPL) 1129 { 1130 #ifdef OPL_OUTPUT_LOG 1131 if(opl_dbg_fp) 1132 { 1133 fclose(opl_dbg_fp); 1134 opl_dbg_fp = NULL; 1135 } 1136 #endif 1137 OPL_UnLockTable(); 1138 free(OPL); 1139 } 1140 1141 /* ---------- Option handlers ---------- */ 1142 1143 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) 1144 { 1145 OPL->TimerHandler = TimerHandler; 1146 OPL->TimerParam = channelOffset; 1147 } 1148 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param) 1149 { 1150 OPL->IRQHandler = IRQHandler; 1151 OPL->IRQParam = param; 1152 } 1153 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param) 1154 { 1155 OPL->UpdateHandler = UpdateHandler; 1156 OPL->UpdateParam = param; 1157 } 1158 /* ---------- YM3812 I/O interface ---------- */ 1159 int OPLWrite(FM_OPL *OPL,int a,int v) 1160 { 1161 if( !(a&1) ) 1162 { /* address port */ 1163 OPL->address = v & 0xff; 1164 } 1165 else 1166 { /* data port */ 1167 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1168 #ifdef OPL_OUTPUT_LOG 1169 if(opl_dbg_fp) 1170 { 1171 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1172 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1173 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v); 1174 } 1175 #endif 1176 OPLWriteReg(OPL,OPL->address,v); 1177 } 1178 return OPL->status>>7; 1179 } 1180 1181 unsigned char OPLRead(FM_OPL *OPL,int a) 1182 { 1183 if( !(a&1) ) 1184 { /* status port */ 1185 return OPL->status & (OPL->statusmask|0x80); 1186 } 1187 /* data port */ 1188 switch(OPL->address) 1189 { 1190 case 0x05: /* KeyBoard IN */ 1191 if(OPL->type&OPL_TYPE_KEYBOARD) 1192 { 1193 if(OPL->keyboardhandler_r) 1194 return OPL->keyboardhandler_r(OPL->keyboard_param); 1195 else { 1196 LOG(LOG_WAR,("OPL:read unmapped KEYBOARD port\n")); 1197 } 1198 } 1199 return 0; 1200 #if 0 1201 case 0x0f: /* ADPCM-DATA */ 1202 return 0; 1203 #endif 1204 case 0x19: /* I/O DATA */ 1205 if(OPL->type&OPL_TYPE_IO) 1206 { 1207 if(OPL->porthandler_r) 1208 return OPL->porthandler_r(OPL->port_param); 1209 else { 1210 LOG(LOG_WAR,("OPL:read unmapped I/O port\n")); 1211 } 1212 } 1213 return 0; 1214 case 0x1a: /* PCM-DATA */ 1215 return 0; 1216 } 1217 return 0; 1218 } 1219 1220 int OPLTimerOver(FM_OPL *OPL,int c) 1221 { 1222 if( c ) 1223 { /* Timer B */ 1224 OPL_STATUS_SET(OPL,0x20); 1225 } 1226 else 1227 { /* Timer A */ 1228 OPL_STATUS_SET(OPL,0x40); 1229 /* CSM mode key,TL control */ 1230 if( OPL->mode & 0x80 ) 1231 { /* CSM mode total level latch and auto key on */ 1232 int ch; 1233 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1234 for(ch=0;ch<9;ch++) 1235 CSMKeyControll( &OPL->P_CH[ch] ); 1236 } 1237 } 1238 /* reload timer */ 1239 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); 1240 return OPL->status>>7; 1241 } 1242